77 lines
1.8 KiB
Go
77 lines
1.8 KiB
Go
// For more tutorials: https://blog.learngoprogramming.com
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//
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// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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package main
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import "fmt"
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func main() {
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// --- #1 ---
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// var games []string
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// fmt.Printf("games's len : %d cap: %d\n", len(games), cap(games))
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// games := []string{}
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// fmt.Printf("games's len : %d cap: %d\n", len(games), cap(games))
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// games = append(games, "pacman", "mario", "tetris", "doom")
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// fmt.Printf("games's len : %d cap: %d\n", len(games), cap(games))
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games := []string{"pacman", "mario", "tetris", "doom"}
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fmt.Printf("games's len : %d cap: %d\n", len(games), cap(games))
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// --- #2 ---
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fmt.Println()
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for i := 0; i <= len(games); i++ {
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s := games[:i]
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fmt.Printf("games[:%d]'s len: %d cap: %d\n", i, len(s), cap(s))
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}
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// --- #3 ---
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fmt.Println()
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zero := games[:0]
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fmt.Printf("games's len: %d cap: %d\n", len(games), cap(games))
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fmt.Printf("zero's len: %d cap: %d\n", len(zero), cap(zero))
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for _, v := range []string{"ultima", "dagger", "pong", "coldspot", "zetra"} {
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zero = append(zero, v)
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fmt.Printf("zero's len: %d cap: %d\n", len(zero), cap(zero))
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}
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// --- #4 ---
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fmt.Println()
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for n := range zero {
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s := zero[:n]
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fmt.Printf("zero[:%d]'s len: %d cap: %d\n", n, len(s), cap(s))
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}
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// --- #5 ---
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fmt.Println()
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zero = zero[:cap(zero)]
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for n := range zero {
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s := zero[:n]
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fmt.Printf("zero[:%d]'s len: %d cap: %d - %q\n", n, len(s), cap(s), s)
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}
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// --- #6 ---
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fmt.Println()
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zero[0] = "command & conquer"
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games[0] = "red alert"
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fmt.Printf("zero : %q\n", zero)
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fmt.Printf("games : %q\n", games)
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// --- #7 ---
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// uncomment and see the error.
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// _ = games[:cap(games)+1]
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// or:
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// _ = games[:5]
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}
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